//
//  NSString+Emoji.m
//  uitextfield
//
//  Created by zhiujunchun on 17/3/3.
//  Copyright © 2017年 PURANG. All rights reserved.
//

#import "NSString+Emoji.h"

@implementation NSString (Emoji)

- (BOOL) containEmoji
{
    NSUInteger len = [self lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
    if (len < 3) {  // 大于2个字符需要验证Emoji(有些Emoji仅三个字符)
        return NO;
    }
    
    // 仅考虑字节长度为3的字符,大于此范围的全部做Emoji处理
    NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding];
    
    Byte *bts = (Byte *)[data bytes];
    Byte bt;
    short v;
    for (NSUInteger i = 0; i < len; i++) {
        bt = bts[i];
        
        if ((bt | 0x7F) == 0x7F) {  // 0xxxxxxx  ASIIC编码
            continue;
        }
        if ((bt | 0x1F) == 0xDF) {  // 110xxxxx  两个字节的字符
            i += 1;
            continue;
        }
        if ((bt | 0x0F) == 0xEF) {  // 1110xxxx  三个字节的字符(重点过滤项目)
            // 计算Unicode下标
            v = bt & 0x0F;
            v = v << 6;
            v |= bts[i + 1] & 0x3F;
            v = v << 6;
            v |= bts[i + 2] & 0x3F;
            
            //            NSLog(@"%02X%02X", (Byte)(v >> 8), (Byte)(v & 0xFF));
            
            if ([self emojiInSoftBankUnicode:v] || [self emojiInUnicode:v]) {
                return YES;
            }
            
            i += 2;
            continue;
        }
        if ((bt | 0x3F) == 0xBF) {  // 10xxxxxx  10开头,为数据字节,直接过滤
            continue;
        }
        
        return YES;                 // 不是以上情况的字符全部超过三个字节,做Emoji处理
    }
    
    return NO;
}
/**
 * 一种非官方的, 采用私有Unicode 区域
 * e0 - e5  01 - 59
 */
- (BOOL) emojiInSoftBankUnicode:(short)code
{
    return ((code >> 8) >= 0xE0 && (code >> 8) <= 0xE5 && (Byte)(code & 0xFF) < 0x60);
}

- (BOOL) emojiInUnicode:(short)code
{
    if (code == 0x0023
        || code == 0x002A
        || (code >= 0x0030 && code <= 0x0039)
        || code == 0x00A9
        || code == 0x00AE
        || code == 0x203C
        || code == 0x2049
        || code == 0x2122
        || code == 0x2139
        || (code >= 0x2194 && code <= 0x2199)
        || code == 0x21A9 || code == 0x21AA
        || code == 0x231A || code == 0x231B
        || code == 0x2328
        || code == 0x23CF
        || (code >= 0x23E9 && code <= 0x23F3)
        || (code >= 0x23F8 && code <= 0x23FA)
        || code == 0x24C2
        || code == 0x25AA || code == 0x25AB
        || code == 0x25B6
        || code == 0x25C0
        || (code >= 0x25FB && code <= 0x25FE)
        || (code >= 0x2600 && code <= 0x2604)
        || code == 0x260E
        || code == 0x2611
        || code == 0x2614 || code == 0x2615
        || code == 0x2618
        || code == 0x261D
        || code == 0x2620
        || code == 0x2622 || code == 0x2623
        || code == 0x2626
        || code == 0x262A
        || code == 0x262E || code == 0x262F
        || (code >= 0x2638 && code <= 0x263A)
        || (code >= 0x2648 && code <= 0x2653)
        || code == 0x2660
        || code == 0x2663
        || code == 0x2665 || code == 0x2666
        || code == 0x2668
        || code == 0x267B
        || code == 0x267F
        || (code >= 0x2692 && code <= 0x2694)
        || code == 0x2696 || code == 0x2697
        || code == 0x2699
        || code == 0x269B || code == 0x269C
        || code == 0x26A0 || code == 0x26A1
        || code == 0x26AA || code == 0x26AB
        || code == 0x26B0 || code == 0x26B1
        || code == 0x26BD || code == 0x26BE
        || code == 0x26C4 || code == 0x26C5
        || code == 0x26C8
        || code == 0x26CE
        || code == 0x26CF
        || code == 0x26D1
        || code == 0x26D3 || code == 0x26D4
        || code == 0x26E9 || code == 0x26EA
        || (code >= 0x26F0 && code <= 0x26F5)
        || (code >= 0x26F7 && code <= 0x26FA)
        || code == 0x26FD
        || code == 0x2702
        || code == 0x2705
        || (code >= 0x2708 && code <= 0x270D)
        || code == 0x270F
        || code == 0x2712
        || code == 0x2714
        || code == 0x2716
        || code == 0x271D
        || code == 0x2721
        || code == 0x2728
        || code == 0x2733 || code == 0x2734
        || code == 0x2744
        || code == 0x2747
        || code == 0x274C
        || code == 0x274E
        || (code >= 0x2753 && code <= 0x2755)
        || code == 0x2757
        || code == 0x2763 || code == 0x2764
        || (code >= 0x2795 && code <= 0x2797)
        || code == 0x27A1
        || code == 0x27B0
        || code == 0x27BF
        || code == 0x2934 || code == 0x2935
        || (code >= 0x2B05 && code <= 0x2B07)
        || code == 0x2B1B || code == 0x2B1C
        || code == 0x2B50
        || code == 0x2B55
        || code == 0x3030
        || code == 0x303D
        || code == 0x3297
        || code == 0x3299
        // 第二段
        || code == 0x23F0) {
        return YES;
    }
    return NO;
}




- (BOOL)isEmoji {
    
    const unichar high = [self characterAtIndex: 0];
    
    // Surrogate pair (U+1D000-1F77F)
    if (0xd800 <= high && high <= 0xdbff) {
        const unichar low = [self characterAtIndex: 1];
        const int codepoint = ((high - 0xd800) * 0x400) + (low - 0xdc00) + 0x10000;
        
        return (0x1d000 <= codepoint && codepoint <= 0x1f77f);
        
        // Not surrogate pair (U+2100-27BF)
    } else {
        return (0x2100 <= high && high <= 0x27bf);
    }
}
/**
 *  判断字符串中是否存在emoji
 */
- (BOOL)stringContainsEmoji{
    
    __block BOOL returnValue = NO;
    
    [self enumerateSubstringsInRange:NSMakeRange(0, [self length]) options:NSStringEnumerationByComposedCharacterSequences usingBlock:
     ^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
         
         const unichar hs = [substring characterAtIndex:0];
         // surrogate pair
         if (0xd800 <= hs && hs <= 0xdbff) {
             if (substring.length > 1) {
                 const unichar ls = [substring characterAtIndex:1];
                 const int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
                 if (0x1d000 <= uc && uc <= 0x1f77f) {
                     returnValue = YES;
                 }
             }
         } else if (substring.length > 1) {
             const unichar ls = [substring characterAtIndex:1];
             if (ls == 0x20e3) {
                 returnValue = YES;
             }
             
         } else {
             // non surrogate
             if (0x2100 <= hs && hs <= 0x27ff) {
                 returnValue = YES;
             } else if (0x2B05 <= hs && hs <= 0x2b07) {
                 returnValue = YES;
             } else if (0x2934 <= hs && hs <= 0x2935) {
                 returnValue = YES;
             } else if (0x3297 <= hs && hs <= 0x3299) {
                 returnValue = YES;
             } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50) {
                 returnValue = YES;
             }
         }
     }];
    
    return returnValue ;
}
/**
 *  判断字符串中是否存在emoji
 */
- (BOOL)hasEmoji{
    NSString *pattern = @"[^\\u0020-\\u007E\\u00A0-\\u00BE\\u2E80-\\uA4CF\\uF900-\\uFAFF\\uFE30-\\uFE4F\\uFF00-\\uFFEF\\u0080-\\u009F\\u2000-\\u201f\r\n]";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:self];
    return isMatch;
}

/**
 * 判断 字母、数字、中文
 */
- (BOOL)isInputRuleAndNumber
{
    NSString *other = @"➊➋➌➍➎➏➐➑➒";     //九宫格的输入值
    unsigned long len=self.length;
    for(int i=0;i<len;i++)
    {
        unichar a=[self characterAtIndex:i];
        if(!((isalpha(a))
             ||(isalnum(a))
             //             ||((a=='_') || (a == '-')) //判断是否允许下划线，昵称可能会用上
             ||((a==' '))                 //判断是否允许空格
             ||((a >= 0x4e00 && a <= 0x9fa6))
             ||([other rangeOfString:self].location != NSNotFound)
             ))
            return NO;
    }
    return YES;
}

/**
 判断是不是九宫格
 */
-(BOOL)isNineKeyBoard
{
    NSString *other = @"➊➋➌➍➎➏➐➑➒";
    int len = (int)self.length;
    
    if (len == 0) {
        return NO;
    }
    
    for(int i=0;i<len;i++)
    {
        if(!([other rangeOfString:self].location != NSNotFound))
            return NO;
    }
    return YES;
}

- (BOOL)isIncludingEmoji {
    BOOL __block result = NO;
    
    [self enumerateSubstringsInRange:NSMakeRange(0, [self length])
                             options:NSStringEnumerationByComposedCharacterSequences
                          usingBlock: ^(NSString* substring, NSRange substringRange, NSRange enclosingRange, BOOL* stop) {
                              if ([substring isEmoji]) {
                                  *stop = YES;
                                  result = YES;
                              }
                          }];
    
    return result;
}

- (instancetype)removedEmojiString {
    NSMutableString* __block buffer = [NSMutableString stringWithCapacity:[self length]];
    
    [self enumerateSubstringsInRange:NSMakeRange(0, [self length])
                             options:NSStringEnumerationByComposedCharacterSequences
                          usingBlock: ^(NSString* substring, NSRange substringRange, NSRange enclosingRange, BOOL* stop) {
                              [buffer appendString:([substring isEmoji])? @"": substring];
                          }];
    
    [buffer stringByReplacingOccurrencesOfString:@"\n" withString:@""];
    [buffer stringByReplacingOccurrencesOfString:@"\r" withString:@""];
    [buffer stringByReplacingOccurrencesOfString:@" " withString:@""];
    
    return buffer;
}


@end
